Iran / Persia: Interior courtyard of the Masjid-I-Shah Mosque, Isfahan. Pascal Coste, c. 1845

Xavier Pascal Coste (26 November 1787, Marseille - 8 February 1879) was a French architect. His father was one of the leading joiners in Marseille. Showing intellectual and artistic promise, Pascal began his studies in the studio of Penchaud, architect of the departement and the municipalite. In 1814, he was received into the Ecole des Beaux-Arts in Paris. His time in Paris was a pivotal one in his life - there he met the geographer Edme Francois Jomard, who put him in touch with the viceroy of Egypt, Mehmet Ali, who took Coste on as his architect in 1817.